cc: Trigger BeginFrame when children needs it without SetNeedsCommit

cc/scheduler/scheduler.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/scheduler/scheduler.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/debug/trace_event.h"
@@ skipping 428 matching lines @@
     // Queuing the frame counts as "using it", so we need to return true.
   } else {
     BeginImplFrame(adjusted_args);
   }
   return true;
 }
 
 void Scheduler::SetChildrenNeedBeginFrames(bool children_need_begin_frames) {
   DCHECK(settings_.forward_begin_frames_to_children);
   state_machine_.SetChildrenNeedBeginFrames(children_need_begin_frames);
-  DCHECK_EQ(state_machine_.NextAction(), SchedulerStateMachine::ACTION_NONE);
+  ProcessScheduledActions();
 }
 
 // BeginRetroFrame is called for BeginFrames that we've deferred because
 // the scheduler was in the middle of processing a previous BeginFrame.
 void Scheduler::BeginRetroFrame() {
   TRACE_EVENT0("cc", "Scheduler::BeginRetroFrame");
   DCHECK(!settings_.using_synchronous_renderer_compositor);
   DCHECK(begin_retro_frame_posted_);
   begin_retro_frame_posted_ = false;
 
@@ skipping 340 matching lines @@
 }
 
 bool Scheduler::IsBeginMainFrameSentOrStarted() const {
   return (state_machine_.commit_state() ==
               SchedulerStateMachine::COMMIT_STATE_BEGIN_MAIN_FRAME_SENT ||
           state_machine_.commit_state() ==
               SchedulerStateMachine::COMMIT_STATE_BEGIN_MAIN_FRAME_STARTED);
 }
 
 }  // namespace cc